[clang] [llvm] [RISCV] Bump zicfilp to 0.4 (PR #75134)

[Yeting Kuo via cfe-commits]

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@@ -736,7 +736,7 @@ R"(All available -march extensions for RISC-V
     xventanacondops     1.0
 
 Experimental extensions
-    zicfilp             0.2       This is a long dummy description
+    zicfilp             0.4       This is a long dummy description
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yetingk wrote:

It's added by #66715. I guess it is means that we don't check the description.

https://github.com/llvm/llvm-project/pull/75134